"Whipping through the glass" means that he's mixing cocaine to make crack in a glass pan. "whipping" means to stir a mixture. And "through the glass" refers to the glass pans usually used in the process of making crack cocaine.
Person 1: "damn nigga it stanks in here!
Person 2: "I makin crack nigga"
Person 1: naw nigga you doin it all wrong, you gotta whip it through the glass nigga!"
Person 2: "I know nigga! actin like I don't know how to make this shit?!"
Person 1: "I whip you through that glass if you don't stop talkin like that!"
Fogey/fogy /fougi/ sl. (early 18C+, orig. Scot) old-fashioned, stuck-in-the mud.
Person with old fashioned ideas which he is unwilling to change: Come to the disco and stop being such an old fogey!
You think me an old fogeyand an old tory, his thoughtful voice said. I saw three generations since O’Connel’s time. I remember the famine. Do you know that the orange lodges agitated for repeal of the union twenty years before O’Connel did or before the prelates of your communion denounced him as a demagogue? You fenians forget some things. (James Joyce, Ulysses. Penguin Books,1992. p. 38)